Title :
Algorithm of multi-epoch trajectory determination
Author :
Cao Xiao ; Li Yaping ; Zhang Shuangna ; Wang Hongwei
Author_Institution :
Satellite Navig. Dept., Space Star Technol. Co. Ltd., Beijing, China
Abstract :
GPS is the most used navigation system in today´s transportation world. However the performance of GPS decreases in mountains, valleys, urban canyons, where it is not always possible to track enough satellites to calculate the 3-D position. This paper outlines a new method to improve the performance of GPS positioning service, especially for fixed-route transport (train or bus). The algorithm of multi-epoch trajectory determination (METD) is based on multi-epoch observations with Least Squares Adjustment (LSA) to track the trajectory of the moving object. The result is satisfactory, even when the current visible satellites are insufficient.
Keywords :
Global Positioning System; least squares approximations; object tracking; traffic engineering computing; transportation; 3D position calculation; GPS performance; GPS positioning service; LSA; METD; bus; fixed-route transport; least squares adjustment; mountains; moving object trajectory tracking; multiepoch observation; multiepoch trajectory determination algorithm; navigation system; satellites; train; transportation; urban canyons; valleys; Availability; Curve fitting; Equations; Global Positioning System; Mathematical model; Monitoring; Trajectory; GPS positioning; motion constraints; multi-epoch trajectory determination;
Conference_Titel :
Mechatronic Sciences, Electric Engineering and Computer (MEC), Proceedings 2013 International Conference on
Conference_Location :
Shengyang
Print_ISBN :
978-1-4799-2564-3
DOI :
10.1109/MEC.2013.6885511
